Exploited
medium
5.3
CWE
119 122 120
Advisory Published
Updated

CVE-2025-20128: ClamAV OLE2 File Format Decryption Denial of Service Vulnerability

First published: Wed Jan 22 2025(Updated: )

A vulnerability in the Object Linking and Embedding 2 (OLE2) decryption routine of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to an integer underflow in a bounds check that allows for a heap buffer overflow read. An attacker could exploit this vulnerability by submitting a crafted file containing OLE2 content to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the ClamAV scanning process, resulting in a DoS condition on the affected software. For a description of this vulnerability, see the . Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

Credit: psirt@cisco.com psirt@cisco.com

Affected SoftwareAffected VersionHow to fix
debian/clamav<=0.103.10+dfsg-0+deb11u1<=1.0.7+dfsg-1~deb11u2<=1.0.7+dfsg-1~deb12u1<=1.4.1+dfsg-1
ClamAV

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Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of CVE-2025-20128?

    The severity of CVE-2025-20128 is critical due to its potential to cause a denial of service condition.

  • How do I fix CVE-2025-20128?

    To fix CVE-2025-20128, update ClamAV to a patched version as specified in the relevant security advisories.

  • Who is affected by CVE-2025-20128?

    CVE-2025-20128 affects users of ClamAV versions up to 1.4.1 and various iterations of earlier releases.

  • What type of vulnerability is CVE-2025-20128?

    CVE-2025-20128 is an integer underflow vulnerability in the OLE2 decryption routine.

  • Can CVE-2025-20128 be exploited remotely?

    Yes, CVE-2025-20128 can be exploited by unauthenticated remote attackers to induce a denial of service.

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